Запись файла в UTF8 без BOM

<?php
if(!defined('DATALIFEENGINE')) {
    die("Hacking attempt!");
}
define('ROOT_DIR', '../..');
define('ENGINE_DIR', '..');

require_once ENGINE_DIR . '/data/config.php';
$file=array(
    'update_time'=>4*60*60, // промежуток обновления кэша в секундах
    'filename'=>ENGINE_DIR ."/cache/weather.txt", // куда писать кэш страницы
);
    function get_city_name()
    
    {
        
    $city_name = '';
    $ip_to_test= $_SERVER['REMOTE_ADDR'];
        if ($ip_to_test!="")
        {
            $IP=strip_tags(substr($ip_to_test,0,20));
            if (preg_match_all("!^([0-9]+)\.([0-9]+)\.([0-9]+)\.([0-9]+)$!si", $IP, $match))
            {
                $bits['a']=implode($match[1]);
                $bits['b']=implode($match[2]);
                $bits['c']=implode($match[3]);
                $bits['d']=implode($match[4]);
            }
            else
            {
                //echo"Illegal IP-address: <font color=\"red\">$IP</font> Enter another IP-address<br>";
                return $city_name;
            }
            $error = 0;
            if (!($bits['a'] >= '0' and $bits['a'] <= '255')) $error=1;
            if (!($bits['b'] >= '0' and $bits['b'] <= '255')) $error=1;
            if (!($bits['c'] >= '0' and $bits['c'] <= '255')) $error=1;
            if (!($bits['d'] >= '0' and $bits['d'] <= '255')) $error=1;
            if ($error == 0)
            {
                $ADDRESS = $bits['a']*256*256*256+$bits['b']*256*256+$bits['c']*256+$bits['d'];
                $master_fale= ROOT_DIR .'/dbcity/cidr_ru_master_index.db';
                $master_record=file($master_fale);
                $master_index=0;
                foreach($master_record as $key=>$master_new_record)
                {
                    $new_record=trim($new_record);
                    list($start,$stop,$inetnum,$country,$city,$region,$district,$status,$slave,$n_slave) = preg_split('!\t!', $master_new_record);
                    $master[$master_index] =array(start => $start,stop => $stop,inetnum => $inetnum,country => $country,city=>$city,region=>$region,district=>$district,status => $status,slave => $slave,n_slave => $n_slave);
                    $master_index++;
                }
                unset($master_record);
                foreach($master as $key=>$new_master)
                {
                    if ($ADDRESS>=$new_master['start'] && $ADDRESS<=$new_master['stop'])
                        $NEW_ADDRESS_0=$new_master;
                }
                unset($master);
                if ($NEW_ADDRESS_0!="")
                {
                    $block_0 = $NEW_ADDRESS_0['inetnum'];
                    $country_0 = $NEW_ADDRESS_0['country'];
                    $city_0 = $NEW_ADDRESS_0['city'];
                    $region_0 = $NEW_ADDRESS_0['region'];
                    $district_0 = $NEW_ADDRESS_0['district'];
                    $status_0 = $NEW_ADDRESS_0['status'];
                    $block_0= "Block:\t".$block_0."<br>\n".
                        "Country: \t".$country_0."<br>\n".
                        "City: \t".$city_0."<br>\n".
                        "Region: \t".$region_0."<br>\n".
                        "District: \t".$district_0."<br>\n".
                        "Status: \t".$status_0."<br><br>\n";
                        $city_name = $city_0;
                }
                else
                {
                    //echo"No RIPE-region. Enter another IP-address.<br>\n";
                    $NEW_ADDRESS_0['slave']=-1;
                }
                if ($NEW_ADDRESS_0['slave']!=-1)
                {
                    $slave_fale= ROOT_DIR .'/dbcity/cidr_ru_slave_index.db';
                    $slave_record=file ($slave_fale);
                    $slave_index=0;
                    $min=$NEW_ADDRESS_0['slave'];
                    $max=$min+$NEW_ADDRESS_0['n_slave'];
                    while($min<$max)
                     {
                        $slave_record[$min]=trim($slave_record[$min]);
                        list($start,$stop,$inetnum,$country,$city,$region,$district,$status,$rest) = preg_split('!\t!', $slave_record[$min]);
                        $_slave[$slave_index]=array(start => $start,stop => $stop,inetnum => $inetnum,country => $country,city=>$city,region=>$region,district=>$district,status=>$status);
                        $slave_index++;
                        $min++;
                    }
                    foreach($_slave as $key=>$new_slave)
                    {
                        if ($ADDRESS>=$new_slave['start'] && $ADDRESS<=$new_slave['stop'])
                            $NEW_ADDRESS_1=$new_slave;
                    }
                    $block_1 = $NEW_ADDRESS_1['inetnum'];
                    $country_1 = $NEW_ADDRESS_1['country'];
                    $city_1 = $NEW_ADDRESS_1['city'];
                    $region_1 = $NEW_ADDRESS_1['region'];
                    $district_1 = $NEW_ADDRESS_1['district'];
                    $status_1 = $NEW_ADDRESS_1['status'];
                    $block_1="Block:\t".$block_1."<br>\n".
                        "Country: \t".$country_1."<br>\n".
                        "City: \t".$city_1."<br>\n".
                        "Region: \t".$region_1."<br>\n".
                        "District: \t".$district_1."<br>\n".
                        "Status: \t".$status_1."<br>\n";
                        //echo $block_1;
                        $city_name = $city_1;
                }
                else
                {
                    //echo $block_0;
                }
            }
            else
            {
                //echo"Illegal IP-address: <font color=\"red\">$IP.</font> Enter another IP-address<br>";
            }
    }
    return $city_name;
    }

    unset ($citynum);
    unset ($city_auto);
    $city_auto = '';
    $city_auto = get_city_name();
require_once('engine/classes/gismeteo/baza_gismeteo.php');
  $xmlq = @file_get_contents($file['filename']);
    $gg=explode("tuxon",$xmlq);
    // проверим сколько времени прошло
if (time()-$gg[0]>$file['update_time'])
{
//считываем содержимое файла в переменную $xml
$xmlq = file_get_contents('http://informer.gismeteo.ru/xml/'.$citynum.'_1.xml');
//передаём содержимое xml файла расширению SimpleXML
$res1 = simplexml_load_string($xmlq);
//Запускаем цикл для отображения погоды
for ($i = 0; $i < count ($res1->REPORT->TOWN->FORECAST); $i++) {
//время суток прогноза погоды
switch ((int)$res1->REPORT->TOWN->FORECAST[$i]->attributes()->tod):
case  0:$time = 'ночь'; $cs='t';break;
case  1:$time = 'утро'; $cs='s';break;
case  2:$time = 'день'; $cs='s';break;
case  3:$time = 'вечер';$cs='t';break;
default:$time = '';break;
endswitch;
//день недели на который осуществляется прогноз
switch ((int)$res1->REPORT->TOWN->FORECAST[$i]->attributes()->weekday):
case  1:$weekday = 'Воскресенье';break;
case  2:$weekday = 'Понедельник';break;
case  3:$weekday = 'Вторник';break;
case  4:$weekday = 'Среда';break;
case  5:$weekday = 'Четверг';break;
case  6:$weekday = 'Пятница';break;
case  7:$weekday = 'Суббота';break;
default:$weekday = '';break;
endswitch;
//выбор облачности
switch ((int) $res1->REPORT->TOWN->FORECAST[$i]->PHENOMENA->attributes()->cloudiness):
case  0:$cloudiness = 'ясно';$cl=1;break;
case  1:$cloudiness = 'малооблачно';$cl=2;break;
case  2:$cloudiness = 'облачно';$cl=3;break;
case  3:$cloudiness = 'пасмурно';$cl=4;break;
default:$cloudiness = '';break;
endswitch;
//определение типа осадков
switch ((int) $res1->REPORT->TOWN->FORECAST[$i]->PHENOMENA->attributes()->precipitation):
case  4:$precipitation = 'дождь';$cd=1;break;
case  5:$precipitation = 'ливень';$cd=2;break;
case  6:$precipitation = 'снег';$cd=3;break;
case  7:$precipitation = 'снег';$cd=3;break;
case  8:$precipitation = 'гроза';$cd=2;break;
case  9:$precipitation = 'нет данных';$cd=5;break;
case 10:$precipitation = 'без осадков';$cd=0;break;
default:$precipitation = '';break;
endswitch;
//определение направления ветра
switch ((int) $res1->REPORT->TOWN->FORECAST[$i]->WIND->attributes()->direction):
case  0:$w_direct = 'с';break;
case  1:$w_direct = 'с-в';break;
case  2:$w_direct = 'в';break;
case  3:$w_direct = 'ю-в';break;
case  4:$w_direct = 'ю';break;
case  5:$w_direct = 'ю-з';break;
case  6:$w_direct = 'з';break;
case  7:$w_direct = 'с';break;
default:$w_direct = '';break;
endswitch;
//город для которого осуществляется прогноз
$namecity = urldecode ($res1->REPORT->TOWN->attributes()->sname);
//день на который осуществляется прогноз
$daygismeteo = $res1->REPORT->TOWN->FORECAST[$i]->attributes()->day;
//месяц на который осуществляется прогноз
$monthgismeteo = $res1->REPORT->TOWN->FORECAST[$i]->attributes()->month;
//год на который осуществляется прогноз
$yeargismeteo = $res1->REPORT->TOWN->FORECAST[$i]->attributes()->year;
// температура
$t_min = $res1->REPORT->TOWN->FORECAST[$i]->TEMPERATURE->attributes()->min;
$t_max = $res1->REPORT->TOWN->FORECAST[$i]->TEMPERATURE->attributes()->max;
if ($t_min >0 ) $t_min='+'.$t_min;
if ($t_max >0 ) $t_max='+'.$t_max;
// давление
$d_min = $res1->REPORT->TOWN->FORECAST[$i]->PRESSURE->attributes()->min;
$d_max = $res1->REPORT->TOWN->FORECAST[$i]->PRESSURE->attributes()->max;
// скорость ветра
$w_min = $res1->REPORT->TOWN->FORECAST[$i]->WIND->attributes()->min;
$w_max = $res1->REPORT->TOWN->FORECAST[$i]->WIND->attributes()->max;
// влажность
$r_min = $res1->REPORT->TOWN->FORECAST[$i]->RELWET->attributes()->min;
$r_max = $res1->REPORT->TOWN->FORECAST[$i]->RELWET->attributes()->max;
// комфорт
$h_min = $res1->REPORT->TOWN->FORECAST[$i]->HEAT->attributes()->min;
$h_max = $res1->REPORT->TOWN->FORECAST[$i]->HEAT->attributes()->max;
if ($h_min >0 ) {$h_min='+'.$h_min;$h_col='+';}
if ($h_max >0 ) {$h_max='+'.$h_max;$h_col='+';}
//выводим пользователю прогноз

$gismeteo .="<div id='modpogoda'><br>".$daygismeteo.".".$monthgismeteo.".".$yeargismeteo."&nbsp;<span class='mptime'>&nbsp;".$weekday."&nbsp;&nbsp;".$time."</span></div>
<table><tr>
  <td valign='top'><img src='//s2356.онега-авто.рф/img/pogoda/".$cs.$cl.$cd.".png' alt='' title='".$cloudiness.",  ".$precipitation.", комфорт ".$h_min."...".$h_max." &#176;C'width='48'><br></td>
  <td><span class='other2'>".$cloudiness.",  ".$precipitation."</span><br>
  <span class='tempp'>".$t_min." ... ".$t_max." &#176;C</span><br>
      <span class='other'>давление: ".$d_min."...".$d_max." мм<br>
    ветер:  ".$w_direct."  ".$w_min."...".$w_max." м/с<br>
    влажность:  ".$r_min."...".$r_max." %<br>
    комфорт: ".$h_min."...".$h_max." &#176;C</span><br>
  </td>
</tr></table>";}

$gg[1]="<div class='namecity'>".$namecity."</div>".$gismeteo;
$fp=fopen($file['filename'],'wb+');
//fwrite($fp, pack("ССС",0xEF,0xBB,0xBF)); //Пишем сигнатуру UTF-8
fwrite($fp,b"\xEF\xBB\xBF".$con); 
fwrite($fp, time().'tuxon'.$gg[1]);
fclose($fp);
@chmod($file['filename'], 0666);
    
}
@header("HTTP/1.0 200 OK");
@header("HTTP/1.1 200 OK");
@header("Cache-Control: no-cache, must-revalidate, max-age=0");
@header("Expires: 0");
@header("Pragma: no-cache");

$tpl->result['gismeteo'] .=$gg[1];
?>